Ultrastructure and Gene Mapping of the Albino Mutant al12 in Rice (Oryza sativa L.) |
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Authors: | XIA Jiu-Cheng WANG Yu-Ping MA Bing-Tian YIN Zhao-Qing HAO Ming KONG De-Wei LI Shi-Gui |
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Institution: | aRice Institute of Sichuan Agricultural University, Wenjiang 611130, China;bKey Laboratory of Crop Genetic Resources and Improvement, Ministry of Education, Sichuan Agricultural University, Ya'an 625014, China;cPanzhihua University, Panzhihua 617000, China |
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Abstract: | Seedling albino mutation resistant to low temperature is an adaptability of rice (Oryza sativa L.) to cold. The mutant, a conditional expression controlled by development and temperature, differs from other albino mutants. The chlorophyll content of the mutant was measured using a portable chlorophyll meter, and the ultrastructure of the chloroplast was observed using a transmission electron microscope. Chlorophyll content was 1.2 SPAD, and the chloroplast did not develop, with only small vesicle-like structures. A segregation analysis of the reciprocal crosses between the albino mutation line with the rice line 9311 demonstrated that the albino trait was controlled by a single recessive gene, which was flanked by SSR markers RM5068 and RM3702 on the short arm of chromosome 8 with a distance of 0.5-1.1 cM and 4.9 cM, respectively. This gene was mapped within a 6 cM interval region and was tentatively referred to as al12. |
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Keywords: | rice albino mutant chloroplast gene mapping |
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